BITSAT 2022 Paper

Section: Mathematics

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Question : 124 of 130

Marks: +1, -0

The smallest positive integral value of n such that [‌

1+sin‌

π

8

+i‌cos‌

π

8

1+sin‌‌

π

8

−i‌cos‌

π

8

]n is purely imaginary, is equal to

4
3
2
8

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